Process for resolving emulsions of tar or tar oils



1 recovery ofwater gastar'or tar oils derived itajinsia considerable proportion of su sions containing these substances." Theterm; juntilyt'he hydrocarbon is; uniformly, "a di Water gas. tar (which consists-almost entirely gcipitation ofthe solid h yiclrocarbonand "sub-i of oils and contains 'little o-r no pitch) and sequent 'agglOmGI'atIOD of theoilfwith 'sp the phase' of the emulsion which contains-the V QI -{"O: fjlcoagulitlnglithe? emulsifying error oil and tosep'a-ra'te"out'salarge p'iOj ag nt"pmv1ded;that l hejeniulslon'isrendered portion of the aqueous phase. -3An0the1"ob i V faintly acid." 'Itiisthenfouiidthat a large Wl1en2faill;tl 6f E fl h l e hasbee "d p'1'oportion of the-phase 'containi ngthe tar e h -m y b r ld y wqlsd;

' mass; -Preferably,thehgfdiocarloonis add-" idp fthis thick-"mass.-fThisfl found tobea very convenient solidihydro CQIIGBIIt, fexami'leiwper 1 carbon for use in the PIQCGSS,aCCOIdingftOffW ll M -parts byiWe1ght*of;the em Patented Dec. 1s, "1 92s; 7 L 'j 'a- HE B'ER mum: nonmsoivforBfiiMmGrrnM, r n nss biw mgmgrams or n wrist BRoMwIo gnNGL n I rnoqnss -ron'niisozlvindnmunsxons or 4 "R'fflAR oin s1 N0 Drawing. Appl i cation fi1ed; September 15, 19s), seri my. 219,802, and in' iG reat Bfritain jDe em 'r 1 This invention relates to the separation or the? einulsion or "suspension initiall fromtar from aqueous'emu'lsions or suspendrocarbon; llrIlS SHfi lClGlltffO heat' the iniizturef tar oils? as hereinjused'in thespecificati'on conipljetely{dissolifed l andjthenfto jpoolfit; 7 and following claims is intended to include rapldly with'Fst rrlng.iThis resultsfinipre;

distillates of every kindoftar except'those ar'at'ion oftthe Water, heoil*mayfthelilbe" containing large quantities of pitch-*with reco vered byt any-usual'method, for exampls which theprocess hereinafterdisclosed will; byiallowlng the' ghot oilito'cooli owl ncl i r. not Work With'equal satisfaction. f thento drain tawayi dmrthenaphtha he, The primary object of the presentgiinven-- whl eh 'willhave"separatedgjln practicejit is" tion is a process for resolving aqueous einulfound that noadd t on of naphthal n 't th; sions 01' suspensions containing" Water gas 7 1 1 3 01 rlequ red; lf vth naphthalenegalg5, tars' orlike tars or :oils" by*bringingfsueh"; yfpr sent' simqthe; order. is emulsions or" suspensionsinto intimate} con- 0%bYEWG1ghi1flfjth6 oil in theiernuls'iong', I V i a tact ivvitha solid hydrocarbon 'body iiia; ;;In theFprocessesaccording toth present finelydivide'd state, in' order to-agg'lomerate -1 lV6I'1 1 'I1';I10 Other {agent than itheijhydrq i With the hydrocarbon a largeproportion-Tot 'Q T Q ryl i' breakingjthefeinnlaz jectiofthe invention is'toeffect thisresolu-s gi f derthaws invlgiaibamayib tion by means'of a eheap'and easily'obtain-z g y s ood and 'ly-ii air 1 able material and fa-fu rtherobjeot isjto e 'g jfi e examples no w bef'g'ive f blend'two or moredifierent emulsions to PI' C SBSO IIdH C Bd 1n accordancejthere ith i treatmentinaccor'dance'withitheinventioni creosote ernulsion centaining 32 i -cn ir 1 "These and other objectsareiattained ac Water *may hetaken iandgheat'ed With "10m cording to the present invention loy a p'i'oe-f "Pa bff ilghtof Crude-Inaphthalenefuntil ess Which'consistsbroadly'in adding a 'hythe,latte?'lS'COIIiPlQtGlYfllSSQlVd; Th mi drocarbon Which-is soluble in'tar or oiland- Q S made 'falntlyc-acld by the iadditi n f.

has a melting p -I00d e to a me gq ty e 'i in f l' e iidfer f the emulsion after first 1E?enfderi11g1thelatter pr d to a g afm l jfl'qC-gdn I athick mass, w hile a-large pr0fp0rti0n 0fthe ZQ a dgagg m mt-with"the aqueous phase separates out frond thethijek pa z'by lwelght ofwfl li. separate ed to the emulsion or suspension andfdisen to 87.8 percent of'the total;wa 6r solved initby heating andthe mix-tureis' ff ef' Qnki 2.- then rapidly cooled so as t'o'cau'se the hy- =an he a ewh r heBmuISIQnC ndrocarbon to separateout in a-finely divided films a qn d rable; amount of nap t len ulsio the present-invention, and may be -used inflthe maybe takn;.jrendered' slightly; ac'i 1 a1 crude or refinedstate; j heatediuntil"the naphthalene'dissolvesf'f'As Although it is preferred to 'add'the solid beforel upon' rapidicoolingthe-pil'and naphhydrocarbon such as naphthalene; to the ,thalene agglomerateinto a thick'imass, 2 nd emulsion orisuspension, yet in cases Where 890jpartsl by Weight'of waterv are foundf toi i the'emulsion or susp'ension'slightly acidbe- One method of accomplish fore treatment.

ing this consists, for example, in saturating it with carbon dioxide, sulphur clioxide' or flue gases,

Although in the examples, ives ha naphthalene" has been in entionechfthe inven tion is not, of course, liin ited to this.

tar or oil in all proportions acenaphthene,

phenanthrene and; parafiin'wax would 7 all aserve to efiectr'es0luti01rof emulsions con;

taining tar oil, but for one reason or another these substances are not as-eflicient,

or desirable as naphthalene. V i

' I The improved process is rgparticularlyl useful' forresolving. heterogeneous emulsions or 7 containing water-gastar or otheriarsif theyare blended with thateven when the emulsion isbroken by suspensions of water in oil suchas are met' with in tar works and gasworks. f It maybe used to resolve an emulsion for suspens on creosote and like oil. In many cases met with in practice, the 'creosote'or; tariis -of;

3 other known methods very considerable dit;

ated 'mass overcomes these 7 Further, where emulsionsior suspens onsj'are V r 40 "ficulty is usually experienced in obtaining 35 a good separation.- By the novelmethod ac-, cording to specific gravity 'of-the semisolid agglomerencountered havingve y different water contents, these'mayberendered more suitable 7 u below 100 v(3., heating the mixture. thus for treatment by blending.

Having thus described ;our invention what we claim as new, and desire to secure by Letters Patent, is

1.v The method of of tar oils which consists in rendering; the". emulsion faintly acid, adding thereto a. quantity, greater than 10 per cent by weight of the oleaginous phase, 'ofa solidihydro-v carbon soluble in the oleaginousfphas'eoii the emulsion and havling a, melting point formed above the melting point of said hydrocarbon, rapidly cooling said mixture to precipitate said hydrocarbonin a finely divided state and settling out the; water from the resulting stifi agglomerate Dist Lid:

said hydrocarbon;

2, The. method of ,reso'lving' 'an V emulsion f of tar oils which consists in blending Itooleaginous phase and a An 'hydrocarbon, solid at ordinary 'teinperatures miscible with. andmelting below 10Q"degrees"C.,may be used. Byway of example,

contact with 1t 7 v of naphthalene greater than 10 per centby weight of the oleaginous phase of 1 r emulsions ,vcontaining the present invention the high difficulties.

which consist in bringing, the naphthalene in i gether. ah'plurality ofsuch emulsions i containing different proportions of water, rendering said blend of emulsions faintly acid, adding thereto aquantity, greater than 10 per cent by weight of the oleaginous' phase thus formed above the melting point of said hydrocarbon, rapidly c001- 111 cai bon in a finely divided state, and settling out the water from the rresulting; stiff ag glomerate ofsaid oleaginous, phase and said hydrocarbon. I

said mixture to precipitate'said hydro- 1 3., The method of resolving an 1 emulsion:

of tar oils which consists on rendering the emulsion faintly acid, bringing into intimate in a finely divided state a, quantity said emulsion, and settling out the; water from the resulting stiflaggloinerate of said oleaginous phase and said naphthalene.

.4. The method ofresolvinglan emulsion of tar oils which- -consists in; rendering heating the 'inixtuije thus;

the "emulsion faintly acid, adding thereto a quantity of naphthalene-greater than 10 per cent by weight of theoleag'inous phase of said emulsion, about the same specific gravity as wateriso,

formed above the melting point of naphthaelene,. rapidly cooling said mixture to I pre oipitate the naphthalene in a finely divided 'state,fland,settling.out the water from the resulting stifi agglomerate of the oleaginous' phase and said naphthalene.

In a processjof resolving a iaintly'acidil emulsion of tar oils containing a'quantity 0t naphthalene in; "solid form greater than 10 percent by weight of the oleaginous phase of theemulsion, the steps which consist inheating said emulsion above the 'melting point of said napthalene,

,sionto' precipitate the rapidly cooling the emulnaphthalene ina' finely;-v divided state, and settling out thewater from resolving an emulsion the resulting stifi agglomerate of said ole:

aginousi phase and saidnapthalene; 6.,In ralprocess of resolving an emulsion oftar oils" containing a quantity of napthalenein solid form greater than 10 per cent I weight of theoleaginous phase, the steps a finely divided-state into intimate contact with the emulsion, and settling out the water 'from the resultingstift agglomerate of said 

